I think if I remember right Magnesium Sulphate is 9.8% magnesium by weight... 10%. Perhaps someone with a scale can measure it for you.

Most people only absorb between 25% and 75% of the magnesium from a whole food dependent upon their current health etc. Considering that in the last 100 years or so magnesium levels in foods have dropped one would consider supplementing in some way.

Magnesium absorption from Epsom Salt would most likely be much less than absorption from a whole food... that is where the skin comes in; transdermal absorption may be your best bet if you are looking to increase magnesium levels in the body over and above what you may get through foods.

Thanks to the links by grzbear i just bought 25kg bag of Epsom Salts and have been doing the baths for about 4 nights now.

i was hesitant to do Epsom Salt baths previously because i didnt see what the benefit would be, just seemed like a waste of Epsom Salts to me, also the price for the amount needed for a bath wasnt exactly cheap here.

but i found a guy on ebay selling the 25kg bags for good price so i bought a bag.

have to say so far it is helping me to sleep much better and i have been doing them before bed.

also since being on the Iodine therapy i had some restless energy or anxiety that resulted in me leg tapping a lot or using my stepper exercise machine.

so far i have noticed less of this with the baths. the downside is i havent used the stepper hardly since starting the baths and so am getting less exercise, and so i dont know what to make of it at this stage.

maybe i need not do the Epsom Salt baths every night?
maybe i should quit oral supplementation of magnesium whilst doing the baths, even though oral supplementation appears to be near worthless.

i also notice a strange effect when i start taking extra magnesium, i talk to myself. its a bit worrying really, but its like my brain is more active in planning things and i cant help it sometimes. having cfs for several years my brain is often very non active so i think its a good sign.
i noticed this effect whilst taking magnesium taurine supplement which somone recommeneded and is supposed to be well absorbed and also with the epsom salt baths (esp the first 2 days), so it appears to me i am defniitely absorbing magnesium from the baths. I did not notice this effect from taking bog standard magnesium supplement from health food shop so that appears to backup i was not absorbing this very well.

I agree with grzbear. Epsom Salts is good for laxative; because the magnesium sulfate is not very bioavailable. It just sits in the intestines collecting liquid. So it really should not matter how much is in a teaspoon. It will just pass through the body. The best way to get magnesium is from food.

i remember reading once about someones grandfather or some other person who would dip a wet knife into a tub of Epsom Salts each morning for their dose of magnesium, but thanks for the info, i guess i'll look elseewhere for magnesium source, that table looks useful, thanks.

Thanks to the links by grzbear i just bought 25kg bag of Epsom Salts and have been doing the baths for about 4 nights now.

i was hesitant to do Epsom Salt baths previously because i didnt see what the benefit would be, just seemed like a waste of Epsom Salts to me, also the price for the amount needed for a bath wasnt exactly cheap here.

but i found a guy on ebay selling the 25kg bags for good price so i bought a bag.

have to say so far it is helping me to sleep much better and i have been doing them before bed.

also since being on the Iodine therapy i had some restless energy or anxiety that resulted in me leg tapping a lot or using my stepper exercise machine.

so far i have noticed less of this with the baths. the downside is i havent used the stepper hardly since starting the baths and so am getting less exercise, and so i dont know what to make of it at this stage.

maybe i need not do the Epsom Salt baths every night?
maybe i should quite oral supplementation of magnesium whilst doing the baths, even though oral supplementation appears to be near worthless.

i also notice a strange effect when i start taking extra magnesium, i talk to myself. its a bit worrying really, but its like my brain is more active in planning things and i cant help it sometimes. having cfs for several years my brain is often very non active so i think its a good sign.
i noticed this effect whilst taking magnesium taurate supplement which somone recommeneded and is supposed to be well absorbed and also with the epsom salt baths (esp the first 2 days), so it appears to me i am defniitely absorbing magnesium from the baths. I did not notice this effect from taking bog standard magnesium supplement from health food shop so that appears to backup i was not absorbing this very well.